GBA BIOS / Gameboy Advance BIOS



You need three things to succesfully emulate Gameboy Advance games on your computer or mobile device: a GBA emulator, a GBA BIOS file, and a Gameboy Advance ROM. This page includes the BIOS file that is essential to playing any GBA emulator. If you still need an emulator ROMs, you can check out our Gameboy Advance emulator list, and for ROMs, you can browse our huge collection of GBA ROMs.

If you've already downloaded an emulator and loaded the ROM, you'll begin to worry why it's not working. Think of it like this, you've bought a car but you don't have the key to start it. The BIOS (the key), has a specific set of instructions that tell the Emulator (the car), how to start. So unless you've downloaded and setup the BIOS, the emulator is not going to work.

There is one exception to the rule, there is an emulator out there that has a custom-made BIOS file built-in and does not require a BIOS file. However, this cloned or custom-made BIOS does not emulate GBA ROMs as well and you'll end up downloading the BIOS folder anyway.


Gameboy Advance BIOS ( - 13.3 KB
(Download didn't work? Click here)

How the GBA BIOS Works

Gameboy Advance handheld consoles includes a small BIOS ROM built-in the CPU, this program code serves three purposes:
  • The Intro Sequence. Displays the Gameboy logo and Nintendo logo each time when the GBA is switched on.
  • The SWI Functions. Maths, initialization, decompression, and other functions, which can be used by GBA software.
  • Multiboot Function. Allows to boot the GBA from other computers or consoles even if no cartridge is inserted.

Step-by-Step Usage Instructions

Step 1. Download

Share this page to download the GBA BIOS file above, it is compressed in a zip file so you'll need to extract the ZIP file. See Step 2.

Step 2. UnZIP

Unzip the the file( and place the unzipped BIOS file (gba_bios.bin) in the same folder the GBA ROMs are located in. In some cases, place the file in the same folder the Emulator is located. The best way to figure this out is to refer to the emulator documentation. Most developers follow these rules, however some stray and do their own thing.

Step 3. Open Emulator

If you're using a PC or MAC, just open the emulator and it should be ready to go. With some emulators, PC, MAC, or Android, you'll need to specify where the BIOS is located and/or load it into the settings. It's really that simple. Keep in mind with android devices, you may need to "Save Configuration Settings". This tells the emulator where the BIOS file is every time you load the emulator, so make sure to verify beforehand. If you have any additional issues or the BIOS file just isnt working, submit comments below and we're happy to help. Thanks again for downloading at